CVE-2026-5102 | Totolink A3300R 17.0.0cu.557_b20221024 Parameter /cgi-bin/cstecgi.cgi setSmartQosCfg qos_up_bw command injection

VDB-354127 · CVE-2026-5102 · GCVE-100-354127 TOTOLINK A3300R 17.0.0CU.557_B20221024 PARAMETER /CGI-BIN/CSTECGI.CGI SETSMARTQOSCFG QOS_UP_BW COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.7 $0-$5k 1.84+ Summaryinfo A vulnerability marked as critical has been reported in Totolink A3300R 17.0.0cu.557_b20221024. This issue affects the function setSmartQosCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. This manipulation of the argument qos_up_bw causes command injection. This vulnerability is tracked as CVE-2026-5102. The attack is possible to be carried out remotely. Moreover, an exploit is present. Detailsinfo A vulnerability has been found in Totolink A3300R 17.0.0cu.557_b20221024 and classified as critical. Affected by this vulnerability is the function setSmartQosCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument qos_up_bw with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-5102. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK. It is possible to download the exploit at github.com. It is declared as proof-of-concept. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Vendor Totolink Name A3300R Version 17.0.0cu.557_b20221024 License commercial Website Vendor: https://www.totolink.net/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 5.7 VulDB Base Score: 6.3 VulDB Temp Score: 5.7 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Command injection CWE: CWE-77 / CWE-74 / CWE-707 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/29/2026 Advisory disclosed 03/29/2026 +0 days VulDB entry created 03/29/2026 +0 days VulDB entry last update Sourcesinfo Vendor: totolink.net Advisory: github.com Status: Not defined CVE: CVE-2026-5102 (🔒) GCVE (CVE): GCVE-0-2026-5102 GCVE (VulDB): GCVE-100-354127 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/29/2026 19:56 Changes: 03/29/2026 19:56 (57) Complete: 🔍 Submitter: LtzHuster2 Cache ID: 99:23A:101 Submitinfo Accepted Submit #779129: Totolink A3300R 17.0.0cu.557_b20221024 Command Injection (by LtzHuster2) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸